recently, for performance, i have started using a different approach to the in-game resolution.

let's say the big region is 1280x1024 and the little regions are 320x256. originally, i would recommend setting the in-game res to 1280x1024... but this would result in ALL regions rendering at that res, which can be fairly intensive. (ie: for 5 regions, that would be roughly 1280x1024x5 pixels or 6.6m pixels per frame)

instead, i decided to try cutting the in-game resolution by 50%... so instead of 1280x1024... i would set it to 640x512. i figured this would reduce the number of pixels to render drastically (down to 1.6m pixels in the example.. a 75% reduction in rendering requirements) while allowing for a simple 200% zoom on wows part when rendering the main region (a 200% zoom is almost trivial compared to scene rendering)

i hope that makes sense. give it a shot and see what you think.